HD is the abbreviation for High Definition in English, which refers to an image or video with a vertical resolution greater than or equal to 720, also known as high-definition image or high-definition video, and the size of which is usually 1280×720 and 1920×1080.
HD High Definition means " high resolution",*** has four meanings: HDTV, HD equipment, HD format, HD movie.DVD gives the audiovisual enjoyment unmatched in the VCD era, but with the advancement of technology and people's needs to follow up, people put forward higher requirements for the various qualities of the video.
Often the physical resolution of more than 720p format known as high-definition, the English expression High Definition, or HD, the so-called full high-definition (Full HD), refers to the physical resolution of up to 1920 × 1080 progressive scan, that is, 1080p high-definition, the top high-definition specifications.
HD applications and value:
1, audio-visual entertainment
High-definition technology brings consumers a more realistic audio-visual experience. The rise of high-definition TVs, high-definition projectors, high-definition audio and other devices allows us to enjoy movie theater-level audiovisual effects at home. For example, when catching up on TV shows and movies, HD picture quality is able to present more details and richer color levels, which can better reproduce the creator's intent.
2, education, medical field
High-definition technology also provides a convenient application for education and medical field. In remote education and telemedicine, high-definition technology can make remote communication clearer and smoother, so that students, patients and medical staff can quickly and accurately complete communication and diagnosis.
3, architectural design and simulation
Architectural design, machine manufacturing and other fields can also apply high-definition technology to simulation and display. For example, high-definition technology can make architects and designers better understand the needs of customers and provide more intuitive and realistic design solutions; in machine manufacturing, high-definition technology can help engineers better complete the machine model design and production process arrangements.
4, security monitoring
HD technology also plays a huge role in the field of security monitoring. High-definition surveillance cameras and video recording equipment can provide a clearer, more detailed picture, so that security monitoring can more accurately identify suspects or accidents, thus improving the effectiveness and value of security prevention.
Overall, HD technology has profoundly impacted people's lives and work, providing us with richer and more diverse experiences and services.
Reference for the above: Baidu Encyclopedia-HD